An elastomeric check valve that may be installed within pre-existing process lines or plumbing that includes an internal bore. In various aspects the disclosed check valve has a stem or stem assembly configured to engage the bore to retain the check valve in place and an elastomeric sealing disk or member. At least a radially outer portion of the elastomeric sealing disk or member is biased or biasable in a selected direction away from a plane that is coincident with a central portion of the elastomeric sealing disk. Fluid may flow through a channel in the stem through a stem assembly and around the elastomeric sealing disk in the selected direction, but is substantially prevented from flowing around the elastomeric sealing disk in a direction opposite to the selected direction, when the check valve is installed within the bore.

The present invention relates to sealing valves that can be mounted within a container wall, enabling controlled fluid flow along both inner and outer surfaces of the sealing valve in the same distal direction.

It is provided a valve, particularly for a bowl and/or a bottle for receiving and/or mixing fluids, comprising a vent for injecting a fluid, wherein the vent comprises an inlet connected to a discharge opening via a discharge channel, a flexible diaphragm for covering the discharge opening of the vent, wherein the flexible diaphragm comprises a holding collar for receiving a measuring cylinder, particularly in a press-fitted manner, and a fastening means for loss-proof receiving the flexible diaphragm between the fastening means and the vent , wherein the fastening means is releasably connected to the vent, wherein the vent comprises a support collar supporting the holding collar, wherein the holding collar comprises a sealing rim protruding mainly radially outwards, wherein the sealing rim is arranged between the fastening means and the support collar and is in sealing contact to the fastening means.

A check valve for a solenoid valve inclues a check valve seat that is arranged on an edge of a fluid passage and a movable closing element configured to execute a direction-oriented throughflow and sealing function. The closing element includes a sealing cone, a contact foot with a plurality of outflow grooves formed on the edge, and an elastic sealing ring that is arranged between the contact foot and the sealing cone. The outflow grooves form in each case a seating edge for the elastic sealing ring during sealing. The outflow grooves are configured in each case with an arcuate seating edge, which has a predetermined arc length, so that a circle segment of the elastic sealing ring, with an opening angle in the region of 40° to 120°, butts against the respective seating edge during sealing. A solenoid valve includes the check valve.

The present disclosure provides a valve for a respiratory mask. The valve includes a valve housing including a valve seat and an inlet. The valve includes a valve flap at least partially received within the valve housing. The valve flap is sealingly engaged with the valve seat in a closed configuration and is disengaged from the valve seat in a plurality of open configurations. The valve flap includes a tubular projection extending away from the valve seat along a longitudinal axis. The plurality of open configurations includes a first open configuration and a second open configuration. The valve further includes a pin slidably received through the valve housing and coupled to the tubular projection. The pin and the valve flap are together movable along the longitudinal axis relative to the valve seat. The valve further includes a valve cage coupled to the valve housing.

A reed valve assembly includes a retainer, one or more reed cages, and a plurality of reed petals. The retainer includes a flange, first and second openings, and a center retainer separating the first and second openings. The reed cages are configured to be advanced from the bottom of the retainer and partially through the first and second openings of the retainer and have at least two inner openings generally facing each other and at least two outer openings generally facing away from each other. The inner and outer openings are configured to be fluidly coupled to the first and second openings of the retainer. The reed petals are configured to extend over the inner openings and the outer openings. The center retainer and reed cages include one or more reed cage grooves and reed cage flanges configured secure the reed cages to the retainer.

A reed valve assembly includes a retainer, one or more reed cages, and a plurality of reed petals. The retainer includes a flange, first and second openings, and a center retainer separating the first and second openings. The reed cages are configured to be advanced from the bottom of the retainer and partially through the first and second openings of the retainer and have at least two inner openings generally facing each other and at least two outer openings generally facing away from each other. The inner and outer openings are configured to be fluidly coupled to the first and second openings of the retainer. The reed petals are configured to extend over the inner openings and the outer openings. The center retainer and reed cages include one or more reed cage grooves and reed cage flanges configured secure the reed cages to the retainer.

A valve comprises a first housing including a first lumen extending therethrough and defining a first disk-facing surface and a second housing including a second lumen extending therethrough and defining a second disk-facing surface, the second housing being mated to the first housing so that the second disk-facing surface faces the first disk-facing surface in combination with a flexible disk gripped between gripping portions of the first and second disk-facing surfaces, the disk including a slit extending therethrough which, when acted upon by a fluid pressure of at least a predetermined threshold level opens to permit fluid flow between the first and second lumens and which, when acted upon by a fluid pressure less than the threshold level remains sealed preventing fluid flow between the first and second lumens and a relief well between opposing portions of the first and second housings radially outside the gripping portions, a width of the relief well exceeding a width of a radially outer portion of the flexible disk so that the radially outer portion of the disk is free to move therewithin.

An air intake assembly for a centrifugal blower having a casing having an axial inlet and a radial outlet, an impeller disposed within the casing for drawing a gaseous medium at a first pressure into the axial inlet and expelling gaseous medium at a second higher pressure through the radial outlet, and a motor for driving the impeller, including an air intake assembly casing having an air inlet and an air outlet, the air outlet connectable to the axial inlet of the blower casing of the centrifugal blower, and a check valve mounted within the air intake assembly casing positioned to permit air flow from the air inlet through the air intake assembly casing to the air outlet and prevent air flow from the air outlet through the air intake assembly casing to the air inlet.

A ventilation component (1a) is to be attached to a housing (2) at a ventilation opening (5). The ventilation component (1a) includes a gas-permeable membrane (10), a ventilation valve (20), and a structural member (30). The structural member (30) has an inner space (40), and at least one of a first ventilation path (51) and a second ventilation paths (52). The inner space (40) is a space accommodating the gas-permeable membrane (10) and/or the ventilation valve (20). The first ventilation path (51) allows the inner space (40) to communicate with an external space of the ventilation component (1a). The first ventilation path (51) has a first inner opening (51i) and a first outer opening (51e), and the first inner opening (51i) faces the first outer opening (51e). The first inner opening (51i) and the first outer opening (51e) are present along a plane parallel to an outer surface (2s) of the housing. The second ventilation path (52) has a second inner opening (52i) and a second outer opening (52e), and the second inner opening (52i) is present without facing the second outer opening (52e).